Mixing and discharging apparatus for cement and cther substances



L. H. EICHELBERGER. MIXING AND DISCHARGING APPARATUS FOR CEMENT ANDOTHER SUBSTANCES. APPLICATION FILEDJAN. I9, 1917.

1,334,895. Patented Mar. 23, 1920. 2 SHEET$-SHEET I. %9

'1 Atty L..-H'. ElCHELBERGER. MIXING AND DISCHARGING APPARATUS FORCEMENT AND OTHER SUBSTANCES.

APPLICATION FILED JAN. 19, 1917- 1,334,895. Patented Mar. 23, 1920.

2 SHEETS-SHEET 2- lmmlllllllllm Ill In ventor:

A rty LEWIS H. EIGI-IELBERGER, 0F PLAINFIELD, NEW JERSEY.

MIXING AND DISCHARGING APPARATUS FOR CEMENT AND OTHER SUBSTANCES.

Specification of Letters Patent.

Patented Mar. 23, 1920.

Application filed January 19, 1917. Serial No. 143,208.

To all whom it may concern Be it known that I, LEWIS H. Tiller-Innwoman, a citizen of the United States, and a resident of the city ofPlainfield, in the county of Union, State of New Jersey, have inventedcertain new anduseful Tmprovements in Mixing and Discharging Apparatusfor Cement and other Substances, of which the following is aspecification.

The improvements relate to mechanism for mixing and discharging cement,grout and other substances, and more particularly to apparatus in whichthe cement or, the like is mined, ted, aquaiied, and placed forgrouting, stucco work or other workv of similar character by the aid ofair under pressure. lits objects are, among others, to produce amechanism of this character in which the cement is mixed with sand orother aggregates, discharged at a uniform rate and placed with greatercl'liciency, thoroughness and certainty; and to so con struct andarrange the various parts that the entire operation is performedpneumatically. Other objects otthe invention will appear to thoseskilled in the art from the following description:

The improvements are illustrated. in the accompanying drawings, referredto herein, in which Figure l is a side elevation of a pneumatic mixingand discharging apparatus embodying the improvements; Fig. 2. is an endelevation of the same; Fig. 3 is a plan of the same with the upper partof the mixing chamber removed; Fig. 1 is a vertical section on the lineas of Fig. 3 looking in the direction of the arrows.

The mixing chamber 1 is cylindrical in form and has a removable cover 2which may be opened to permit the materials to be deposited therein. Airis supplied to this chamber through the pipe 3 and controlled by a valvea thereon, passing to the annular conduit 5 near the mouth 6 of theconical bottom 7 and thence through the channels 8 and orifices 9 and 10into the interior oi the mixing chamber. The channels 8 and the orificesare located in the radial ribs '11, and the conical bottom 7 is securedto the casing 12 by machine ;:screws'13 passed through the horizontalflange 1a 1 extending outwardly from its upper edgebelng passed throughthe aperture in the Flange and threaded into 1 thegS-Etld casing} Thelower-l edge'ofthe cylinder of the chamber 1 is held between the outeredges oi this flange and a shoulder 16 oi? the casing. The lower edgesof the conical bottom 7 are thickened to allow space for the conduit 5and strengthen them and to receive the inner end of the pipe 3, whichcommunicates with the conduit 5 through a short conduit 15. In operationthe valve 1 is opened and air under pressure admitted, and this passesthrough the orifices 9 and 10 into the bottom of the mass of materialsin the mixing. chamber, passing up therethrough and out through the pipe17 communicating with the upper part thereof,

after agitating and commingling the aggregates The pipe 17 communicateswith a vertical tube 18 through a union 19 and the tube 18 extendsdownwardly to a point below the bottom of the mixing chamber where it isconnected through an elbow 20 and pipe 21 with the discharge conduit 22,the ends of 21 and being connected by the sleeve 23. In this manner theair first utilized to mix the materials is passed around the mixingchamber to the discharge conduit at the bottom and there utilized topropel or convey the mixed materials to the place of application. Alimited amount of water may be mixed with the materials in the mixingchamber or prior to their deposit therein, but it is preferred to aquafythem while they are passing through the discharge and conveying conduit22.

Journaled in the casing 12 are a pair of rollers 2 1 and 25 connected byintermeshing gears 26 and 27 at their ends and having the medialportionof their parallel opposing surfaces directly beneath the dischargeopening 6, so that the materials passing through said opening will comein contact therewith and pass between the rollers to the dischargechamber 28 in the lower part ofthe said casing. This passage of thematerials .between the rollers is caused by their rotation in oppositedirections, as indicated by the arrows (Fig. i), and provision is madefor the adjustment or"? the space between the rollers to accommodate thecharacter otthe materials. regulate the speed of discharge, and forother purposes. The materials fall through the discharge chamber 28 tothe sleeve 23 where they are brought under the. influence of the blastoi? air from the pipe 21and propelled through the conduit 22. A. valve.

29 in the lower part of the discharge chamber may be used to restrict orshut off the discharge of materials.

In this manner the materials are permitted to pass to the rollers andfrom the rollers to the conveying conduit substantially by gravity,since the pressure caused by the air from the pipe 21 will be equal toor slightly less than the pressure in the mixing chamber, and thedisturbance of the uniform mechanical discharge of the materials eitherby back pressure against the said discharge or undue forward pressurefrom the mixing chamber is thus prevented.

The rollers 24 and 25 are spaced by means or the wheel on the outer endof the rod 31, the inner end of the rod passing through a stniiing boxand threaded in the internal collar 33 of the casing 12. The roller 25is ournaled at its ends in the lower end of hangers depending within thecasing 12 and mounted therein on suitable pivot bolts 34 fixed to theinside of the casing so as to oscillate, and the extreme inner end ofthe rod 31 passes through a slot in the bar 36 connectlng the two haners. On either side -of the bar 36 the rod 31 has nuts 37 so that whenthe bar is rotated and moves lengthwise inwardly or outwardly these nutswill cause the hanger to move accordingly and move the roller 25 eithertoward or from the opposite roller 24 to adjust the space between them.As the teeth of the gears 26 and 27 are longer than usual this adjustment will not separate them or affect their operation materially in anymanner. The roller 24 is ournaled in the walls of the casing 12 in afixed position.

The roller 24 is driven by means of an air motor 38 supplied with airunder pressure through the branch pipe 39 controlled by the valve 40,and the air is supplied thereto, and to the pipe 3 through thecompressed air conduit 41 connected with any suitable supply ofcompressed air. By this arrangement the valves 4 and 40 may be opened soas to establish a ratio between the supply of air for mixing andconveying and the supply of air for propelling the discharge rollers,and thereafter variations in the pressure of air supplied through themain 41 will have the same relative effect on the said parts of themechanism. It will therefore be seen that an equilibrium and constantoperating ratio between various parts of the apparatus is maintainedunder varying conditions. The shaft 42 of the roller 24 extends throughthe casing 12 and into the air motor and is the means whereby power istransmitted from the motor to the rollers.

The parts of the mechanism heretofore described are mounted on a truck43 with suitable traction wheels 44 and 45 so that the machine may bemoved about as desired.

An electric or other motor may be used in place of the air motor, andthe construction and arrangement of other parts may be changed withincertain limits, without departing from the scope of the invention,except as otherwise specified in the following claims.

It will also be apparent that other features adapted to cooperate withthose herein described and shown may be employed, as, for instance, aconnection between the mixing chamber and the source of COH'IPICSSOd airwhereby the pressure may be maintained in the said chamber and the airconveyed therefrom through the outlet pipe, without passing through thematerials. A branch pipe from the pipe 3 to the tube 18 controlled by atwo-way valve, so that when the passage of air to the bottom of themixing vessel is stopped the air will pass to the said tube 18 and viceversa will accomplish substantially the same result.

What I claim is:

1. In an apparatus of the character described, the combination of achamber adapted to contain materials to be mixed, a conduitcommunicating with the lower part of said chamber and arranged toreceive from a suitable supply and inject co1npressed air thereinto, aconduit leading from the upper part of said chamber and to a point belowthe outlet thereof, said chamber being provided with an outlet openingat its bottom, a conduit communicating between said outlet opening andsaid last named conduit, and means for controlling the discharge ofmaterials from said chamber.

2. In an apparatus of the character dcscribed, the combination of achamber adapted to contain materials to be mixed, a conduitcommunicating with said chamber and arranged to receive from a suitablesupply and inject compressed air thereinto, a conduit leading from saidchamber and to a point below the outlet thereof, said chamber beingprovided with an outlet opening at its bottom, a conduit con'nnunicatingbe tween said outlet opening and said last named conduit and out ofcommunication with the first conduit, and means for controlling thedischarge of materials from said chamber.

3. In an apparatus of the character described, the combination of achamber adapted to contain materials to be mixed, a conduitcommunicating with said chamber and arranged to receive from a suitablesupply and inject compressed air thereinto, a

conduit leading from said chamber and to a point below the outletthereof, said chamber being provided with an outlet opening at itsbottom, a conduit communicating between said outlet opening and saidlast named conduit, means for controlling the discharge of materialsfrom said chamber, and means operated by the same source of air underpressure for actuating the discharge controlling means.

4:. The combination of a vessel constructed to receive and holdmaterials to be mixed, a compressed air supply conduit communicatingtherewith, a conduit for the escape of compressed air therefrom and outof com-- munication with the first conduit, said vessel having an outletat its lower part, a con nection between said air escape conduit andsaid outlet, and a conduit for conveying materials away from said vesselalso communicating therewith, and means between the part of said vesselin which materials are held and the outlet for controlling the escape ofmaterials therefrom.

The combination of a vesselconstructed to receive and hold materials tobe mixed, a compressed air supply conduit communicating therewith, aconduit for the escape of compressed air therefrom, said vessel havingan outlet at its lower part, a connection between said air escapeconduit and said outlet, and a conduit for conveying materials away fromsaid vessel also communicating therewith, means between the part of saidvessel in which materials are held and the outlet for controlling theescape of materials therefrom, and means operated by the same supply ofcompressed air for operating the said discharge controlling means.

6. The combination of a vessel constructed to receive and holdmaterials, said vessel provided with an inlet for air under pressure anda separate outlet for the same, and also provided with an outlet formaterials, means for measuring and controlling the discharge ofmaterials through the said outlet, and a connection between the outletfor air under pressure and the outlet for materials isolated from saidinlet.

7. The herein described process of mixing and discharging sand andcement or similar mixtures and conveying the same to the place ofapplication, which consists in placing the materials in a closed vessel,injecting compressed air into said vessel and into said materials,mixing the same, conveying the said air from the vessel to a pointexterior thereto and discharging the materials from the vessel into aconveying conduit and there subjecting them to the action of said airtaken from the vessel.

8. The herein described process of mixing and discharging sand andcement or similar mixtures and conveying the same to the place ofapplication, which consists in placing the materials in a closed vessel,injecting compressed air into said vessel and into said materials,mixing the same, conveying the said air from the vessel to a pointexterior thereto and discharging the materials from the vessel into aconveying conduit and regulating the said discharge by mechanical means,ausing the said materials to pass into a conveying conduit and theresubjecting them to the action of the air taken from the vessel.

9. The combination with a vessel for mixing and discharging materialsand having a contracted lower portion, of a series of conduits extendingupwardly from the lower part of said vessel in the interior thereof andprovided with orifices at different levels, said vessel having an airchannel at its lower part connecting the said upwardly extendingconduits and an inlet for compressed air communicating with saidchannel, and also an outlet for air at its upper part.

10. The combination with a vessel constructed to receive andholdmaterials to be mixed and having a contracted lower portion and anoutlet in said lower portion, of a series of ribs extending radiallyupward from proximity to said outlet, said ribs having air channelstherein and orifices communicating with the interior of the vessel, andsaid vessel having a laterally extending conduit near its outletcommunicating with the channels of the said ribs and an inlet forcompressed air communicating with the said laterally extending conduit.

Vitness my hand this 22nd day of December, 1916, at the city of NewYork, in the county and State of New York.

LEW'IS H. EIGHELBERGER

